import time

# while True:
#     road = str(input('plz input which road you choice: '))
#
#     if road == 'a':
#         print('you go to xiaohongs home')
#     elif road == 'b':
#         print('b')
#     else:
#         print('c')

a = 10
a += 10 #=> a = a + 10
print(a)